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Finding the Fourth Proportional to 100,932.20, 151,201.46 and 86,891.66

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Solution

The fourth proportional to 100,932.20, 151,201.46 and 86,891.66 is: 130,168.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,932.20 : 151,201.46 = 86,891.66 : x
  2. Step 2: Convert to fraction form
    100,932.20/151,201.46 = 86,891.66/x
  3. Step 3: Cross multiply
    100,932.20x = 151,201.46 × 86,891.66
  4. Step 4: Simplify right side
    100,932.20x = 13,138,145,853.82
  5. Step 5: Solve for x
    x = 13,138,145,853.82/100,932.20
  6. Step 6: Final answer
    x = 130,168.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.